The AirTAC GFR30008F2WTK AirTAC Filter Regulator NPT1/4 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300 series combines water and particulate filtration with pressure regulation in a single compact body, so one 1/4 in NPT connection does both jobs. This GFR30008F2WTK is configured with 5 um filtration (the finer W grade, versus the 40 um standard element), a differential-pressure drain that bleeds accumulated condensate automatically whenever the pressure differential across the element is high enough, an embedded square gauge reading in psi, a reverse/check valve that holds downstream pressure when the upstream supply is lost, and a mounting bracket included in the box. The polycarbonate bowl lets you see the condensate level at a glance, and the standard regulator covers an adjustment range of 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi). Operating temperature is -5 to 70 C (non-freezing).
This is a genuine AirTAC part supplied by an authorised distributor. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with manual, automatic or differential-pressure drains, 40 um or 5 um elements, and gauge or no-gauge options. Flow figures for this series are published as curves rather than a single rated number, so send us your application details and we will confirm the sizing and datasheet figures on request.
| Model | GFR30008F2WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Feeding filtered, regulated air to the tool-change clamps and pneumatic actuators on a machining centre, where the 5 um element protects close-tolerance valves and the check valve holds clamp pressure if the shop supply dips.
Supplying the divert gates, pushers and bag-seal cylinders on a packaging conveyor, with the square psi gauge letting operators verify set pressure at a glance during changeover.
A 1/4 in NPT branch regulator at an assembly or maintenance bench, giving each station its own clean, set pressure independent of the main header, with the differential drain keeping condensate off the bench tools.
Start with the port step: size 300 with a 1/4 in NPT port suits lines where the main air supply is reduced to a 1/4 in branch feeding valves, cylinders or a panel. If your demand sits near the top of what a 1/4 in line can carry, step up to size 400 rather than oversizing the element. Choose the drain to match access: differential-pressure (this unit) needs no routine attention, automatic suits unattended installations, and manual suits points an operator already visits. This unit carries the 5 um W element - pick that over the 40 um standard when downstream equipment or air tools need finer particulate removal; note that a finer element loads faster, so the differential drain earns its keep. The square psi gauge is fitted as standard; MPa and bar scales and an external round gauge are alternatives. G and NPT threads are catalogue options alongside the PT standard, and a bracket is included here.
One honest note on sizing: AirTAC publishes flow for this series as curves, not as a single rated figure, so we do not quote a flow number. Tell us your line pressure, set pressure and expected air demand, and we will confirm the correct size against the datasheet curves before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as performance curves rather than a single rated number, so we do not quote a l/min or SCFM figure. Send us your inlet pressure, set pressure and air demand, and we will confirm the sizing against the datasheet curves on request.
The W in the code GFR30008F2WTK is the 5 um filtration grade, one step finer than the 40 um standard element, chosen when downstream valves or tools need cleaner air. The K is a reverse/check valve, which holds the regulated downstream pressure if the upstream supply is interrupted - useful for clamping or holding circuits. Both are standard catalogue options, not modifications.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.